<template>
    <div>
        <button @click="isShow = true">点我弹窗</button>
        <teleport to="body">
            <div class="mask" v-if="isShow">
                <div class="dialog">
                    <h3>我是一个弹窗</h3>
                    <h4>一些内容</h4>
                    <h4>一些内容</h4>
                    <h4>一些内容</h4>
                    <h4>一些内容</h4>
                    <button @click="isShow = false">关闭弹窗</button>
                </div>
            </div>
        </teleport>
    </div>
</template>

<script>
    import {ref} from "vue"
    export default {
        name:"Dialog",
        setup(){
            let isShow = ref(false);

            return{
                isShow,
            }
        }
    }
</script>

<style>
    .dialog{
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%,-50%);
        text-align: center;
        width: 300px;
        height: 300px;
        background-color: green;
    }

    .mask{
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        background-color: rgba(0, 0, 0, 0.5);
    }
</style>